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USGS Daily Statistics for the Nation

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 01097000 ASSABET RIVER AT MAYNARD, MA


Middlesex County, Massachusetts
Hydrologic Unit Code 01070005
Latitude  42°25'55", Longitude  71°27'01" NAD27
Drainage area 116  square miles
Contributing drainage area 116  square miles
Gage datum 146 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1940-10-01 -> 2025-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 215 239 287 490 309 195 106 69 64 94 134 193
2 222 230 286 509 299 200 106 68 69 87 133 195
3 223 239 307 513 287 205 104 66 71 82 137 196
4 224 260 325 512 284 203 102 62 69 81 142 192
5 222 266 329 507 277 197 101 59 62 84 144 189
6 216 253 333 504 266 200 96 56 58 89 146 191
7 211 243 351 486 257 207 90 55 62 92 144 199
8 206 241 367 459 250 214 88 61 65 92 144 206
9 209 232 370 429 248 209 94 67 68 94 148 207
10 221 220 373 404 250 198 101 70 69 91 152 209
11 231 221 369 392 255 185 98 70 74 89 157 216
12 226 228 370 380 255 170 94 69 81 88 159 232
13 224 226 370 371 253 164 90 68 84 88 160 236
14 222 228 383 370 253 171 88 67 77 89 161 232
15 221 233 410 362 250 173 83 66 71 96 165 235
16 218 239 416 368 247 162 81 66 66 107 164 232
17 210 248 419 393 248 154 77 65 63 117 165 230
18 203 251 435 395 245 149 78 67 68 114 163 236
19 203 257 448 378 240 141 77 81 81 109 157 246
20 207 253 443 361 234 133 76 112 84 110 149 236
21 210 249 433 341 227 128 76 106 79 121 150 225
22 217 253 445 330 219 122 77 86 76 126 157 222
23 227 263 473 331 206 119 81 73 72 121 170 224
24 240 268 480 336 195 119 91 68 73 117 177 227
25 273 289 467 333 194 117 92 64 73 116 178 231
26 310 311 455 323 197 115 84 60 78 123 185 233
27 317 308 450 318 201 113 77 56 80 125 192 232
28 322 298 448 314 197 113 74 58 80 124 190 229
29 300 297 449 312 188 113 73 61 86 126 189 220
30 272   464 312 186 109 74 62 93 135 192 217
31 251   482   189   70 64   136   216